Water Heater Replacement: Cost, Lifespan & When to Budget
Water heaters are among the most predictable replacements in a home. Tank units are cheaper up front but last about half as long as tankless models. Because failure often means a leak, planning replacement before end of life avoids water damage.
Typical lifespan & replacement cost
| System | Typical lifespan | Replacement cost (national) |
|---|---|---|
| Water heater replacement (tank) | 8–12 yrs | $1,200–$2,500 |
| Water heater replacement (tankless) | 15–20 yrs | $2,500–$4,500 |
Cost ranges are national baselines; your report adjusts them for home size, your state's labor market, and local climate.
Warning signs it's time to plan
- Rusty or discolored hot water
- Rumbling or popping noises from sediment
- Water pooling near the base
- Inconsistent water temperature
- Unit age past 10 years (tank) or 15 (tankless)
Frequently asked questions
- How long does a water heater last?
- Tank water heaters typically last 8–12 years; tankless units 15–20. Hard water shortens both, so flushing sediment annually helps.
- Tank vs. tankless — which is cheaper overall?
- Tankless costs more to install but lasts longer and uses less energy. Over 20 years the total cost is often comparable; tankless wins on lifespan and space.
See when your water heater is due
A full report estimates the remaining life and replacement cost of this system — and 20+ others — for your specific home. Free.
Run my free report